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Patented May 31, 1887.

(No Model.)

CT. F. CARD. ELECTRIC MOTOR.

I UNITED STATES PATENT OEErcE.

GEORGE F. CARD, OF COVINGTON, KENTUCKY, ASSIGNOE TO THE GEORGE F. CARD MANUEACTURNG COMPANY, OF SAME PLACE.

`ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 364,086, dated May 31, 1887.

Application tiled November 2S), 1886. Serial No, 220,102. (No model.)

To all whom it may concern,.-

Be it known that I, GEORGE F. CARD, of Covington, Kenton county, Kentucky, have invented a new and useful'Improvement in '5 Electro-Magnetic Motors, of which the following is a'specification.

My invention is an improvement in what is known as the Pacinotti type of electric motors; and it consists in features of useful to novelty, hereinafter described and specified.

In the accompanying drawings, Figures 1,

2, and 3 are respectively a front elevation, a

rear elevation, and an aXial section of a ma'- chine embodying my improvements. Fig. 4

t 5 represents the means employed by me to connect each twok consecutive bobbins with their appropriate commutator-plate. Fig. 5 is a topview ofthc brush-holder, two commutator-platcs being shown in section.

The base 1 and the standard 2 may be integral parts of a single casting of bronze or other non-magnetic metal.

3 and 4 are respectively the field and armature rings of my motor. The annular core or '25 ring 3 of my eld is screwed fast at its polar protuberances N S to the standard 2. Screwed to the rear faces of the same protuberances is a steel or iron casting, which constitutes the interior field-magnet, and which consists of a 3o central iillct, 5, that connects a pair of flattened cylindrical corcs, 6, whose L-formed projections 7 combine with said protuberanccs to constitute the U-formed pole-pieces of my field, which will be seen to so nearly surround the armature-bobbins as to reduce to a minimum the amount of idle7 wire thereon. A central orice in the said casting and in the standard 2 receives the armature shaft 8, which is journaled in suitable bearings, 9, that are attached to the standard and to said casting. The armature ring 4 is screwed fast to a web, 10, of bronze or other non-magnetic metal, whose hub 11 is keyed or otherwise securely fastened to the shaft 8. A nut, 12, on the screw-threaded extremity of the said hub 11, and a rubber gasket, 13, hold firmly against the face of the said web 10 a disk, 14, of hard rubber or like substance. A shallow' annular groove or recess, 16, in the Aface of the rubber disk 14 receives the brass 5o commutator plates or sectors 17, which are held in place partly by the rubber gasket 13 and partly by brass clips 18, which are screwed fast to the rubber' disk 14. A brass washer, 19, interposed between the said disk and the u respective clips, serves the double purpose of elevating the said clips suiiiciently from the face of the disk and of affording attachment for the wires 20 2l from the neighboring pair of armaturebobbins, as shown in Figs. 3 and 4. Electrical connection or" these wires is secured by the close contact of the brass clip 13 with both, while the electric loop thus formed has, through the same clip, theelectrical communication with the proper plate of the series of commutatorplates required in this type of machines. The described construction enables` ready inspection of said bobbin-connections and of renewal of any one or more commutator-plates without dismemberment ofthe machine.

Screwed fast to the standard 2 is a plate, 22, of vulcanized ber or like substance, and screwed to this plate are two brass clamps, 23, which coact with said plate to hold the brushes 25 26, of springcopper, whose free ends press against the vertical faces of the commutatorplates, as shown in Figs. 1, 3, and 4.

and may represent suitably-insulated binding-posts for attachment of the line-wires 27 28 and of the ingoing and outgoing wires 29 30 of t-he motor.

The preferred winding (in series) of the iield and armature is shown diagrammatically in the several figures.

To enable ready attachment of the machine to a bench or other fixture, the base l has a vertical orifice, 31, for a pivot-bolt, 32, which secures a clamp or yoke, 33, having two rigid jaws, 34 35, of which the lowerjaw, 35, carries a set-screw, 36, to screw against the under side of such bench. `The screw 32 having been temporarily slackened, the machine may be adjusted to any desired angle for convenient belting or other purpose.

I claim as new and of my invention--h 1. In an electro-magnetic motor, the combination, with the exterior held-magnet, 3, of

17, clips 1S and washers 19, having metallic Contact with the terminals 2O 21 of the pairs of consecutive armaturebobbins, substantially as set forth. r 5 In testimony of which invention I hereunto set my hand.

GEORGE F. CARD.

Witnesses:

GEO. H. KNIGHT, E. M. NVILLIAMs. 

